Either 52 or 54cm should work.

Some user inputs on size with scatterplot showing relation between height and frame size
https://docs.google.com/spreadsheets...GQ/edit#gid=23

second sheet with height and frame size with comments
https://docs.google.com/spreadsheets...BGQ/edit#gid=0

Another thread with similar information
http://www.bikeforums.net/touring/53...l-trucker.html