50/100 4bet pre-shut down or nah?

[DonButtons]

Playing glove55 hu on ft
effective stacks like 8k

He's been 3betting a lot, and so far has called every one of my 3bets, so hes pretty loose in position, but seems predictable postflop..checking way too much..on the passive side forsure

up to this point Ive cbet maybe every single time I 3betted (only played maybe 30-45 minutes) but lost one pot on a Ace high flop where he c/c, then pushed the river in a overbet after I checked t/r.
I make it 300 with Jd8d
he makes it 900
I make it 2700
he calls

flop 5s As Kc
bet $3500 or nay?