In this task, you are given a list. This list contains many lists of integers. The list is several items written within a []. Your task is to find the maximum number among the members of each inner list. The output should be a list comprised of the maximums with the same order as the internal lists.
[[-75, -117, 10, 50, -137, -48, -138], [-56, -27, -163], [-108, -70, 4, -191, -75, -10]]