Just to add one little thing to this that the other answers leave out; If you do this, be sure to have a test reader/friend read it and make sure that they are able to follow that a change of POV has happened. As the writer, you know the change in POV has happened, so it will be harder for you to tell if others will also pick up on it without the knowledge ahead of time.
Changing the POV of the story is fine (and is common), but if the flow doesn't immediately provide some clear detail(s) to show that the POV has changed, the reader will become confused as to what is happening, and what the POV is now. With a jump from first two third, when the reader detects a change of POV, their first instinct will be to figure out whose head their in now.
So have others read it, and get their feedback about how jarring/confusing it was for them the first time. (And have new readers each time, as once they know the POV change is coming, they will be biased as well)