6.50 Stars flopped straight with against possible flush on turn

[bluesunday]

not sure what my line should be on this one.

PokerStars No-Limit Hold'em Tourney, Big Blind is t150 (4 handed) internettexasholdem.com

Hero (t3410)
UTG (t3595)
Button (t1880)
SB (t4615)

Preflop: Hero is BB with T[img]/images/graemlins/club.gif[/img], J[img]/images/graemlins/diamond.gif[/img].
UTG calls t150, <font color="#666666">2 folds</font>, Hero checks.

Flop: (t375) 9[img]/images/graemlins/heart.gif[/img], Q[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets t300</font>, UTG calls t300.

Turn: (t975) 6[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero...</font>

[pattay]

i would bet out for 600 or so, if he raises i guess i muck it, if he calls i probably check the river and re-evaluate