[ismisus]

Forgive me, I just don't understand the post. 75/150 is the first level after rebuys, I don't think you true image is established just yet. The pot is 400+75+400 = 875, where does 1200 come from?

As far as the hand goes, I would increase the pre-flop raise to 450-500 with a hand like TT. I don't like much multi-way action with a hand like TT, unless I hit a set. After the flop I would bet 1/2 the pot, which does several things for me
-induces a raise from top pair
-gives me a chance to get away from the hand on later streets
-allows me to save chips in the future for my continuation bets

in your situation, it would be hard for me not go bust, unless I know my villian very well.