NL50: Hero flops NFD in 3Bet pot

[PietM]

Villain in this hand seemed solid (through datamining, so no reads on him), 22/18/4.5 in 3500 hands.

First of all: is it ok to call the 3bet? Villain folds to steals 80% or so.

Then I flop the NFD. Villain bets into me. What is the best line here? If I raise his bet, I can't really fold to a push I guess. Calling? Or is this an easy fold?

Full Tilt Poker, $0.25/$0.50 NL Hold'em Cash Game, 5 Players
LegoPoker Hand History Converter

SB: $56.75
BB: $51.25
UTG: $54.15
CO: $78.20
PietM (BTN): $134.10

Pre-Flop: A[img]/images/graemlins/diamond.gif[/img] Q[img]/images/graemlins/diamond.gif[/img] dealt to PietM (BTN)
2 folds, <font color="red">PietM raises to $2</font>, SB folds, <font color="red">BB raises to $6.25</font>, PietM calls $4.25

Flop: ($12.75) 6[img]/images/graemlins/diamond.gif[/img] 7[img]/images/graemlins/club.gif[/img] 4[img]/images/graemlins/diamond.gif[/img] (2 Players)
<font color="red">BB bets $9</font>, PietM ???