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.
[[-128, -171, -158, -180], [-46, -53, -146, -180, -108, 23], [78, -24, 65], [-125, -66, -75, -68], [-20, -67, -175, -161], [-144, 96, -107, -118, 91]]