$5+0.50 Early AT, Too Aggressive?

[mosdef]

In retrospect, if I'm going to do this with AT I might as well do it with anything (it's not like I'm ecstatic if an A comes on the flop and I'm called).

PokerStars Tournament, Big Blind is t20 (8 handed) Converter on pregopoker.com

UTG (t1500)
UTG+1 (t1480)
MP1 (t1200)
MP2 (t1480)
Hero (t1470)
Button (t1780)
SB (t3110)
BB (t1480)

Preflop: Hero is in CO with T[img]/images/graemlins/club.gif[/img] A[img]/images/graemlins/diamond.gif[/img]
<font color="gray">UTG folds</font>, <font color="gray">UTG+1 folds</font>, MP1 calls t20, <font color="gray">MP2 folds</font>, <font color="red">Hero raises to t75</font>, <font color="gray">Button folds</font>, <font color="gray">SB folds</font>, <font color="gray">BB folds</font>, MP1 calls t55

Flop: (t180) 5[img]/images/graemlins/heart.gif[/img] 4[img]/images/graemlins/club.gif[/img] 9[img]/images/graemlins/club.gif[/img] (2 players)
MP1 checks, <font color="red">Hero bets t100</font>