On default aircraft in no way.
The cockpit view is bound to the cockpit exclusively on these and there isn’t any cabin modeled. Some views with few 3D windows are set up on these airliners to simulate a cabin view to the outside plus some cabin ambient sounds were added.
Some add-ons like the Aerosoft CRJs got a virtual cabin, however in most cases the cabin belongs to the external model so you have to use an external camera to take a look (drone cam) - you can use this camera to create some views, too.
Here is a tutorial which was created for the CRJ but it should work on any aircraft with some virtual cabin in place:
