First of all,
I’m sorry about my late reply here,
"Life happened." as they say,
but finally I found some extra free time again.
Thank you so much for your tip too PhotonicMusic! 
It sounds like a really good idea to do, I haven’t though about that 
I have no idea at what frequency and how much dB should I cut exactly (for this specific track at least),
so I just tried this:
I lowered 3dB at 1400Hz (with the default Q factor (1.000)).
I set the analyzer frozen for the whole song,
and I tried to adjust the frequency in the 800Hz-2000Hz range like this:
moving to 1300Hz, and then 1200Hz, and then 1100Hz, etc…,
also moving to 1500Hz, and then 1600Hz, and the 1700Hz, etc…,
and I don’t have enough experience with EQ-in (especially for voice overs) to tell which one setting sounds the best for this track,
so I just kept it in the middle of your suggested range.
(I tried to lower it even more (-6dB),
but I found that made it sound weird, like it has a hole in it or something.)
Do you think this sounds good now for voice overs too?
(If you answer will be “Yes”,
then after your answer I will upload this.)
(PS. I just noticed that previously the tuning was set to A = 436Hz, because I forgot that I was playing around with the settings in the beginning, but now it’s set back to normal A = 440Hz tuning…, so that’s why it sounds a bit higher in comparison to the older versions)