Nerdy question about oil accumulators/Accusump

[Windsorpower]

I’ve talked myself into an accumulator for my build and I think I like the manual valve option. Hypothetically, let’s say I’ve got a 351 that just had an oil change with an 8 quart pan. A brand new accumulator is sitting in the trunk, connected to the oil gallery with a copious amount of -10 AN hose and a manual shutoff valve mounted halfway back, let’s say beside the shifter for this example. I start the engine, let it stabilize, and slowly open the valve for the first time, carefully watching the oil pressure to make sure it stays in a safe range while the accumulator fills.

Here’s the nerdy question: What happens to all the air that was in the 6+ feet of hose between the engine and the trunk-mounted accumulator? I’m guessing it burps out through the engine after several accumulator activations?

FYI, 8 feet of -10 hose holds a half quart