How do i find 1800 ml of water would fill a ________ cm3 container

Answer 1

Not sure what you're asking, but 1800ml of water can fill a 1800cm3 container.

Answer 2

As a side note: ml and cm^3 are basically the same, but cm^3 is volume. 10ml is 10cm^3 and 1ml is 1cm^3.