I think you should raise more preflop. I try and raise pot preflop except in very extreme situations. So you want to raise 300 here, or raise to 400. I like the flop play provided you haven't seen this guy donk off money on a paired flop already (at 5.50s, there's a clear breed of players who don't believe in trips). If you're not sure you'll be able to fold to a raise, try check/calling the flop and reevaluate the turn, but your line is fune.