What Rebel pilot has 733 on their helmet that Rey puts on at her abode?

I'm guessing one of the pilots in the Battlefront Battle of Jakku stage. I dunno, I don't own it.

Nah Battlefront tells nothing of jakku other than a massive number of wrecked stuff.

I would guess the answer would be in the book Lost Stars (haven't read it)

There is a UK Air Unit I believe... Maybe that?

What Rebel pilot has 733 on their helmet that Rey puts on at her abode?

The name in Aurebesh on the helmet translates to "Raeh", which implies she may not have even known her name, and just picked one up from the helmet.