I will add a few more comments...
Many are saying the bike is the wrong size. Not necessarily. I was with my group last night out at the park and one of the fastest guys out there is 5'9" on a 51cm Cervelo. He is a strong racer
with saddle in the middle of the seat clamp...but about a 7 inch drop...that's right...7 inches...TT position really and as stout as any TdF set up....lots of post and stem slammed to top of steerer. When out riding...with his hands on the tops...not hoods, his upper back angle was about 15 deg to horizontal....about the same as most in the drops. So...a strong rider can sustain a large drop and ride a very small frame for his size. We obviously don't have that recipe here. There isn't that much post showing for one thing so the frame maybe only one size if that smallish which is easily encompassed by set up. The OP if sticking with this size...and he is obviously a novice rider...should push his saddle closer to center and if necessary, "lower" his handlebar to increase reach compensating for moving the saddle closer to the handlebar.

Last comment made previously that I agree with and a ploy that Cervelo, Look, Trek, Giant and others do is...is they have proprietary seat posts on many of their higher end framesets. This is for revenue mostly...can't change the post on these frames. A frame is only as good as its weakest link. If the offset of the stock post doesn't work, or the micro adjustment and or post fastening design is less than best in class...you are screwed. Look who makes one of the best framesets in the world makes a suck @$$ seat post for example. This puts a great onus on making sure fit on the bike is dialed with conventional setback before you buy it as you are stuck with the post that comes on it...including ability to adjust it.

What we have here is an all too common case of a guy with more money than experience goes to a crappy bike shop who doesn't know how to fit a high end bike and the buyer blows $7-8K on his dream bike when
the most important tenent of any bicycle purchase is violated...fit.