I am 5-11 (and shrinking), so maybe 5-10, 146 pounds. I ride a Surly CC at 54cm. I prefer an aggressive saddle to bar positioning and prefer the smaller side of my fit range, coming from a competitive back ground. You are a big guy OP. You appear to have a long torso, shorter legs and arms, I would say the bike fits you but is on the smaller side of your fit range. Fit range, what do I mean by that, well, bicycles are not all the same and neither are people and most bicycles and people can accommodate one another over a range of size due to adjustability of the frame and preference on the part of the cyclist.
As long as you have full and proper extension of your legs without over extending the seat post, are not scrunched up on top and can get aero (since it does have drops), then you are okay.