Hi Vivek,

Welcome.

49cm sounds real small for a 5'7" rider.
My best ride buddy is 5' 5" and rides a 52cm.

You could have a local shop see if they can get you kind of right on that 49cm.
Longer stem?
Taller seat post?

It won't be perfect, but might be better.
Speaking of might be better, it might be better to buy a bike that fits.
Not to be snarky, but in the hope that you fall crazy in love with this great sport.

Local shop?

I live in Concord, but I drive all the way to Santa Cruz for The Spokesman.
Sunnyvale is a lot closer to them than Concord.
The Spokesman is a world class shop.
Many Pro's have patronized it and taken advantage of the owner's (Wade Hall) fitting brilliance.