When to call with a flush draw?

[MickeyWins]

I am in BB with Qd,6d. blinds are 75/150.
All folds to the button..
who raises it to 300. I call.
the flop is Ad,Tc,2h.....
I check...PFR checks.
turn is the 9d. (giving me a flush draw)
we both still have 2000 back.
and 675 in the pot.
I check...PFR bets 300.
should I call/raise/fold?