Starship itself has ~1000 cubic meters of payload volume, and ISS has ~900 cubic meters of pressurized volume. It's not too much of a stretch to expect >500 cub

Starship itself has ~1000 cubic meters of payload volume, and ISS has ~900 cubic meters of pressurized volume. It's not too much of a stretch to expect >500 cubic meters of pressurized volume in a crew-capable Starship, in which case two Starships would provide a broadly similar amount of pressurized volume in orbit.