Here is the situation: Prof. X organizes an "invited session" at a conference (in the broader realm of statistics and economics), and asks my supervisor, Prof. Y, to give a talk there. Y does not have time and refers X to me (I am a PhD student). Therefore, X asks me whether I would be interested to give a presentation in the session, to which I of course say yes.
Now, my question is the following: Can I list the talk as an invited talk (or more precisely: as an invited conference presentation) in my CV?