if the blinds are 100/200 and he raise to 400, thats a min raise, i would make that 1000 preflop, lets see what he does now. other than that you can also reraise the flop to find out where you are. the way you played it, on the turn i would call one more street, odds
are he is double barreling here, or you could also reraise the turn.
personally i would double barrel if you acted as you did vs me, so i would fire with air on the turn, so i doubt BigThing is right, plus the guy bet only 1200 in a 2200 pot, half of it, which looks weak and that makes me want to bet so bad