PS 5,5 - Nut flush Draw on the flop

[MauMau]

PokerStars No-Limit Hold'em Tourney, Big Blind is t50 (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Hero (t2055)
Button (t1205)
SB (t2075)
BB (t3690)
UTG (t3585)
MP (t890)

Preflop: Hero is CO with A[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/club.gif[/img].
<font color="#CC3333">UTG raises to t150</font>, <font color="#666666">1 fold</font>, Hero calls t150, <font color="#666666">3 folds</font>.

Flop: (t375) 4[img]/images/graemlins/club.gif[/img], 4[img]/images/graemlins/spade.gif[/img], 8[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">UTG bets t150</font>, <font color="#CC3333">Hero raises to t350</font>, UTG folds.

Final Pot: t875

how about that line ? too aggressive?