Pokerstars $5.50 what's the play on the turn, top pair, bad kicker

PokerStars No-Limit Hold'em Tourney, Big Blind is t150 (6 handed) converter (http://www.selachian.com/tools/bisonconverter/hhconverter.cgi)

MP (t2380)
CO (t2950)
Hero (t4840)
SB (t500)
BB (t1640)
UTG (t1190)

Preflop: Hero is Button with T/images/graemlins/spade.gif, J/images/graemlins/spade.gif.
<font color="#666666">3 folds</font>, Hero calls t150, <font color="#666666">1 fold</font>, BB checks.

Flop: (t375) J/images/graemlins/club.gif, 6/images/graemlins/club.gif, 2/images/graemlins/heart.gif <font color="#0000FF">(2 players)</font>
<font color="#CC3333">BB bets t150</font>, Hero calls t150.

Turn: (t675) 3/images/graemlins/diamond.gif <font color="#0000FF">(2 players)</font>
<font color="#CC3333">BB bets t340</font>, Hero???

I wanted to see a cheap flop, table was very tight, and I figured if the blinds showed no strength, I could win a small pot easily.

[handsome]

Why didn't you raise preflop

Stupid, I know. I sometimes get a little weak minded in this spot and don't want to get myself in a position where I have to call if one of the blinds goes all in.

How faulty is that thinking?